LCOV - code coverage report
Current view: top level - libavfilter - vf_format.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 30 53 56.6 %
Date: 2017-12-15 11:05:35 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2007 Bobby Bingham
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : /**
      22             :  * @file
      23             :  * format and noformat video filters
      24             :  */
      25             : 
      26             : #include <string.h>
      27             : 
      28             : #include "libavutil/internal.h"
      29             : #include "libavutil/mem.h"
      30             : #include "libavutil/pixdesc.h"
      31             : #include "libavutil/opt.h"
      32             : 
      33             : #include "avfilter.h"
      34             : #include "formats.h"
      35             : #include "internal.h"
      36             : #include "video.h"
      37             : 
      38             : typedef struct FormatContext {
      39             :     const AVClass *class;
      40             :     char *pix_fmts;
      41             : 
      42             :     /**
      43             :      * pix_fmts parsed into AVPixelFormats and terminated with
      44             :      * AV_PIX_FMT_NONE
      45             :      */
      46             :     enum AVPixelFormat *formats;
      47             : } FormatContext;
      48             : 
      49        5074 : static av_cold void uninit(AVFilterContext *ctx)
      50             : {
      51        5074 :     FormatContext *s = ctx->priv;
      52        5074 :     av_freep(&s->formats);
      53        5074 : }
      54             : 
      55        5074 : static av_cold int init(AVFilterContext *ctx)
      56             : {
      57        5074 :     FormatContext *s = ctx->priv;
      58             :     char *cur, *sep;
      59        5074 :     int nb_formats = 1;
      60             :     int i;
      61             :     int ret;
      62             : 
      63        5074 :     if (!s->pix_fmts) {
      64           0 :         av_log(ctx, AV_LOG_ERROR, "Empty output format string.\n");
      65           0 :         return AVERROR(EINVAL);
      66             :     }
      67             : 
      68             :     /* count the formats */
      69        5074 :     cur = s->pix_fmts;
      70       10946 :     while ((cur = strchr(cur, '|'))) {
      71         798 :         nb_formats++;
      72         798 :         if (*cur)
      73         798 :             cur++;
      74             :     }
      75             : 
      76        5074 :     s->formats = av_malloc_array(nb_formats + 1, sizeof(*s->formats));
      77        5074 :     if (!s->formats)
      78           0 :         return AVERROR(ENOMEM);
      79             : 
      80             :     /* parse the list of formats */
      81        5074 :     cur = s->pix_fmts;
      82       10946 :     for (i = 0; i < nb_formats; i++) {
      83        5872 :         sep = strchr(cur, '|');
      84        5872 :         if (sep)
      85         798 :             *sep++ = 0;
      86             : 
      87        5872 :         if ((ret = ff_parse_pixel_format(&s->formats[i], cur, ctx)) < 0)
      88           0 :             return ret;
      89             : 
      90        5872 :         cur = sep;
      91             :     }
      92        5074 :     s->formats[nb_formats] = AV_PIX_FMT_NONE;
      93             : 
      94        5074 :     if (!strcmp(ctx->filter->name, "noformat")) {
      95           0 :         const AVPixFmtDescriptor *desc = NULL;
      96             :         enum AVPixelFormat *formats_allowed;
      97           0 :         int nb_formats_lavu = 0, nb_formats_allowed = 0;
      98             : 
      99             :         /* count the formats known to lavu */
     100           0 :         while ((desc = av_pix_fmt_desc_next(desc)))
     101           0 :             nb_formats_lavu++;
     102             : 
     103           0 :         formats_allowed = av_malloc_array(nb_formats_lavu + 1, sizeof(*formats_allowed));
     104           0 :         if (!formats_allowed)
     105           0 :             return AVERROR(ENOMEM);
     106             : 
     107             :         /* for each format known to lavu, check if it's in the list of
     108             :          * forbidden formats */
     109           0 :         while ((desc = av_pix_fmt_desc_next(desc))) {
     110           0 :             enum AVPixelFormat pix_fmt = av_pix_fmt_desc_get_id(desc);
     111             : 
     112           0 :             for (i = 0; i < nb_formats; i++) {
     113           0 :                 if (s->formats[i] == pix_fmt)
     114           0 :                     break;
     115             :             }
     116           0 :             if (i < nb_formats)
     117           0 :                 continue;
     118             : 
     119           0 :             formats_allowed[nb_formats_allowed++] = pix_fmt;
     120             :         }
     121           0 :         formats_allowed[nb_formats_allowed] = AV_PIX_FMT_NONE;
     122           0 :         av_freep(&s->formats);
     123           0 :         s->formats = formats_allowed;
     124             :     }
     125             : 
     126        5074 :     return 0;
     127             : }
     128             : 
     129        5062 : static int query_formats(AVFilterContext *ctx)
     130             : {
     131        5062 :     FormatContext *s = ctx->priv;
     132        5062 :     AVFilterFormats *formats = ff_make_format_list(s->formats);
     133             : 
     134        5062 :     if (!formats)
     135           0 :         return AVERROR(ENOMEM);
     136             : 
     137        5062 :     return ff_set_common_formats(ctx, formats);
     138             : }
     139             : 
     140             : 
     141             : #define OFFSET(x) offsetof(FormatContext, x)
     142             : static const AVOption options[] = {
     143             :     { "pix_fmts", "A '|'-separated list of pixel formats", OFFSET(pix_fmts), AV_OPT_TYPE_STRING, .flags = AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM },
     144             :     { NULL }
     145             : };
     146             : 
     147             : #if CONFIG_FORMAT_FILTER
     148             : 
     149             : #define format_options options
     150             : AVFILTER_DEFINE_CLASS(format);
     151             : 
     152             : static const AVFilterPad avfilter_vf_format_inputs[] = {
     153             :     {
     154             :         .name             = "default",
     155             :         .type             = AVMEDIA_TYPE_VIDEO,
     156             :         .get_video_buffer = ff_null_get_video_buffer,
     157             :     },
     158             :     { NULL }
     159             : };
     160             : 
     161             : static const AVFilterPad avfilter_vf_format_outputs[] = {
     162             :     {
     163             :         .name = "default",
     164             :         .type = AVMEDIA_TYPE_VIDEO
     165             :     },
     166             :     { NULL }
     167             : };
     168             : 
     169             : AVFilter ff_vf_format = {
     170             :     .name          = "format",
     171             :     .description   = NULL_IF_CONFIG_SMALL("Convert the input video to one of the specified pixel formats."),
     172             : 
     173             :     .init          = init,
     174             :     .uninit        = uninit,
     175             : 
     176             :     .query_formats = query_formats,
     177             : 
     178             :     .priv_size     = sizeof(FormatContext),
     179             :     .priv_class    = &format_class,
     180             : 
     181             :     .inputs        = avfilter_vf_format_inputs,
     182             :     .outputs       = avfilter_vf_format_outputs,
     183             : };
     184             : #endif /* CONFIG_FORMAT_FILTER */
     185             : 
     186             : #if CONFIG_NOFORMAT_FILTER
     187             : 
     188             : #define noformat_options options
     189             : AVFILTER_DEFINE_CLASS(noformat);
     190             : 
     191             : static const AVFilterPad avfilter_vf_noformat_inputs[] = {
     192             :     {
     193             :         .name             = "default",
     194             :         .type             = AVMEDIA_TYPE_VIDEO,
     195             :         .get_video_buffer = ff_null_get_video_buffer,
     196             :     },
     197             :     { NULL }
     198             : };
     199             : 
     200             : static const AVFilterPad avfilter_vf_noformat_outputs[] = {
     201             :     {
     202             :         .name = "default",
     203             :         .type = AVMEDIA_TYPE_VIDEO
     204             :     },
     205             :     { NULL }
     206             : };
     207             : 
     208             : AVFilter ff_vf_noformat = {
     209             :     .name          = "noformat",
     210             :     .description   = NULL_IF_CONFIG_SMALL("Force libavfilter not to use any of the specified pixel formats for the input to the next filter."),
     211             : 
     212             :     .init          = init,
     213             :     .uninit        = uninit,
     214             : 
     215             :     .query_formats = query_formats,
     216             : 
     217             :     .priv_size     = sizeof(FormatContext),
     218             :     .priv_class    = &noformat_class,
     219             : 
     220             :     .inputs        = avfilter_vf_noformat_inputs,
     221             :     .outputs       = avfilter_vf_noformat_outputs,
     222             : };
     223             : #endif /* CONFIG_NOFORMAT_FILTER */

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